RailModeller Express 4+

I’m just getting into Z-scale modeling, and was in the midst of planning my first permanent layout. To help me with that task, I was actually just looking for a good 2D scale-drawing/CAD program, from which I had planned to make my own track-section templates. I was surprised to find this amazing tool, pre-loaded with ALL the Marklin and Rokuhan track sections available. For my needs, it is just about as perfect as I could imagine. Very easy to use, if you are even remotely familiar with other types of diagramming software. It’s even fun to use. I currently have the free version, but will happily pay for the upgrade to the $40 version, just to support the developer.

Colleague gave me some pointers and I got basic elements of the program to work! Hooray. Thre is a sharp learning curve, and undoubtedly the program has many "features" that I'll never use because I will never figure out how to use them. But for basic track layout planning it can be a useful tool.
I would not rely on the product for final installation of the planned layout (you will definitely need to fit and adjust) as there are too many uncertainties in the track layout plan produced by the program -- it suggests a degree of precision that I don't beleive is warranted -- but using this program did show me that PECO #6 turnouts would not work and that I needed to use #5 turnouts. (I will still test fit both.) That alone was informative.
A user guide would be helpful.

I've used this program to design two layouts. One using Peka HO the other using Rokuhan Z scale. Both part libraries were comprehensive and accurate. The program options allowed me to easily explore ideas and optimize the space I had to work with.

My only nit is the program will silently save a changed file without first asking the usual "Are you sure?" so beware of that.